BeanDefinitionRegistryPostProcessor that replaces multiple discovered PersistenceContextInterceptor beans with
a single aggregating instance. The previous multiple PersistenceContextInterceptor beans will be removed from
the context and re-added as inner beans of the new AggregatePersistenceContextInterceptor bean.
PersistenceContextInterceptor beans are discovered by the bean name. The default pattern used for matching
the beans is ^.*[pP]ersistenceInterceptor$